Guild Wars 2

So I’ve read somewhere that PvP boxes are affected by magic find. Is that true? I’d appreciate it if someone could verify if it is true or not. So if it’s true, then the best place to open PvP boxes is in Silverwastes, since a map mission success gives a 200% MF boost?

https://wiki.guildwars2.com/wiki/Magic_Find

Magic Find
Magic Find is both an account bonus and a character attribute that increases the chance to receive higher-quality loot from slain foes. With a couple exceptions, it does not affect containers (including champion loot bags), chests, or any other source of loot.

The exceptions are:
Containers received from structured PvP reward tracks.
Bandit chests in The Silverwastes

Thank you. So after getting lots of PvP boxes, to maximize potential loot drop, I should open them in SW after the final boss battle.